Each consisting of a 15-foot roll of test paper and matching color chart Hydrion QT-10 Quaternary Test Paper provides a simple, reliable, and economical means to measure the concentration of Quaternary Sanitizers, including n-alkyldimethylbenzyl and/or n-alkyl dimethyl ethyl benzyl ammonium chloride, and Rocall II. With color matches at 0-100-200-300-400ppm (parts per million), the test paper measures concentrations between 0-400ppm, detecting exhaustion of solutions that should be replaced as well as helping to avoid using excessive amounts of sanitizing agents. Dip the strip into the sanitizing solution for 10 seconds, then instantly compare the resulting color with the enclosed color chart which matches concentrations of 0-100-200-300-400ppm. Test solution should be between 65 and 75 degrees Fahrenheit NOTE : HARAP MENANYAKAN STOK TERLEBIH DAHULU SEBELUM ORDER... SILAHKAN TINGGALKAN PESAN DI KOTAK PESAN UNTUK MENANYAKAN PRODUK LAINNYA YANG TIDAK TERTERA DI ETALASE..